A Unitarity-Conserving Higgs Inflation Model

Understand

Scalar field models of inflation based on a large nonminimal coupling to gravity xi, in particular, Higgs inflation, may violate unitarity at an energy scale ~ M_p / xi << M_p.

• In this case the model is incomplete at energy scales relevant to inflation.
• Here we propose a new unitarity-conserving model of Higgs inflation.
• The completion of the theory is achieved via additional interactions which are proportional to products of the derivatives of the Higgs doublet.